After last night’s episode of Supergirl, CBS ran the first extended trailer of the show’s episode featuring The Flash. The trailer showcased the beginnings of a race, plenty of laughs, and a look at who the two heroes will come up against in battle.
Check out the “Worlds Finest” episode synopsis below:
Kara gains a new ally when the lightning-fast superhero The Flash suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home.
You can also view the awesome teaser trailer here: